Python paramiko 模块，common() 实例源码

def set_environment_variable(self, name, value):
        """
        Set the value of an environment variable.

        .. warning::
            The server may reject this request depending on its ``AcceptEnv``
            setting; such rejections will fail silently (which is common client
            practice for this particular request type). Make sure you
            understand your server's configuration before using!

        :param str name: name of the environment variable
        :param str value: value of the environment variable

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        """
        m = Message()
        m.add_byte(cMSG_CHANNEL_REQUEST)
        m.add_int(self.remote_chanid)
        m.add_string('env')
        m.add_boolean(False)
        m.add_string(name)
        m.add_string(value)
        self.transport._send_user_message(m)